I have a 3 phase motor picked up on flea bay with no markings or ratings on it whatsoever.
It is TEFC 100 frame size aluminium clad foot mounted and the body is
220mm long excluding the fan. It is a 6 pole machine (950 ish rpm on 50Hz) The shaft is 28mm diameter which points towards 2-3 hp but the winding resistance is 9 ohms measured from star pint to each winding it seems to run ok on 415v star and 240 delta.Looking at other motors I have with rating plates eg a 1.1kW, 4 pole has a winding resistance of 6.7 ohms.
I 'm surprised if the unknown motor can be 2-3 hp (1.5- 2.2 kW) with such a high winding resistance.
Can anyone suggest what the power rating of the motor might be?
TIA
Bob